The stage of river carrying a discharge of Q m7sec at a point is 10 m and slope of water surface is (1/4000). The discharge of a flood at the same point and same stage of 10 m with a water surface slope of(l/1000) will be________________?

Related Mcqs:

1. Which of the following methods is used to estimate flood discharge based on high water marks left over in the past ?

   A. slope-area method
   B. area-velocity method
   C. moving boat method
   D. ultra-sonic method

2. If the R.L’s of canal bed level and high flood level of drainage are 212.0 m and 210.0 m respectively, then cross drainage work will be________________?

   A. aqueduct
   B. superpassage
   C. syphon
   D. syphon aqueduct

3. The ratio of rate of change of the discharge of an outlet to the rate of change of the discharge of distributing channel is called________________?

   A. proportionality
   B. flexibility
   C. setting
   D. sensitivity

4. The rainfall on five successive days were measured as 100 mm, 80 mm, 60 mm, 40 mm and 20 mm respectively. If the infiltration index or the storm loss rate for the catchment area is earlier estimated as 50 mm/day, the total surface run off will be________________?

   A. 50 mm
   B. 60 mm
   C. 90 mm
   D. 140 mm

5. A river training work is generally required when the river is_______________?

   A. aggrading type
   B. degrading type
   C. meandering type
   D. both (A) and (B)

6. When the upstream face of a gravity dam is vertical, then the intensity of water pressure at the water surface and at the base respectively will be_______________?

   A. 0 and wH212
   B. wH2/2and wH2/3
   C. wH and 0
   D. OandwII

   where w is unit weight of water and H is the depth of water

7. The peak of a 4 hour flood hydrograph is 240 m3/sec . If the rainfall excess is 80 mm and base flow which is constant is 40 m3/sec, then the peak of 4-hours unit hydrograph will be__________________?

   A. 20 3/sec
   B. 25 m3/sec
   C. 30 m3/sec
   D. 35 m3/sec

8. For an annual flood series arranged in descending order of magnitude, the return for a magnitude listed at position period m in a total data N is________________?

   A. N/(m+l)
   B. m/(N+l)
   C. m/N
   D. (N+l)/m

9. If the risk of a flood occurring in the next 10 years is accepted to 10%, then the return period for design should be__________________?

   A. 1 + (0.9)010
   B. 1 – (0.9)°l0
   C. 1/(1-0.9°10)
   D. 1/(1+ 0.9010)

10. For a flood control reservoir, the effective storage is equal to_______________?

    A. useful storage – valley storage
    B. useful storage + surcharge storage
    C. useful storage + surcharge storage + valley storage
    D. useful storage + surcharge storage -valley storage